From The Edge Chronicles:Stormchaser
"The thick, red blood turned into crystal-clear water..."
          
            After creating the sepia powder, now called "phraxdust" the other academics repeat the process. The stormphrax explodes, leaving only one academic alive by the name of Vilnix Pompolnius. A drop of his blood falls into the phraxdust transforming into pure water. Now the question is, why did it not work the second time?